Removing Mold, Mildew & Restaining Wood Siding

It's that time of year again - another project for Mom's house. Single story, two bedroom home in Tahoe. Appears to be mold/mildew around mostly the base of the wood siding from all the snow piling up there over the last 5 - 10 winters. Stain was last applied 5-10 years ago. Nothing is known about the stain or the prep work that was done. The house across the street was in similar/worse condition and they hired someone to remove the mold/mildew and re-stain for around $2200. He said he used something called 'Decks Wood' to clean the mold/mildew and then applied Stain. I don't know what Decks Wood is but the finished product looks good. I'm thinking I can get this done in a few days with the help of my nephew.

Here's my simple plan-

EFC-38 to remove the mold/mildew and strip existing stain.

Citralic Brightener/Neutralizer

Armstrong-Clark Semi-Transparent Stain

Here are a few photos of the mold I'm tasked with removing

I believe EFC-38 is a better choice than HD-80 for environmental reasons, but is it strong enough?

while dekswood is a great cleaner from the Flood company it will not remove mold or mildew which are living spores that feed on linseed oil found in most exterior stains today. Use a solution of household bleach and water (5 parts water to 1 part bleach) Use a pump up weed sprayer to apply to surface allow it to stay on the surface at least 10 minutes then carefully rinse off siding. Always use protective gloves, glasses and clothing when handling bleach and any type of cleaner like dekswood. You must kill the mold and mildew or it will come back even stronger than before. Consider using a waterbased exterior stain because these contain no linseed oil which means no food for the mold and mildew then it cannot grow and survive...

Thanks for the replies. After some further study I've decided to go with the EFC-38, Citralic and Ready Seal. Now I just have to wait for the pollen to die down. That stuff is ridiculous this time of year!

I'll post images when I have it finished. I'll do my best to 'sell' the gutters, too!